
    <nz-select style="width: 100%;" [(ngModel)]="selectedUser" (nzScrollToBottom)="loadMore()" nzPlaceHolder="Select users" nzAllowClear>
      <nz-option *ngFor="let o of optionList" [nzValue]="o" [nzLabel]="o"></nz-option>
      <nz-option *ngIf="isLoading" nzDisabled nzCustomContent>
        <i class="anticon anticon-loading anticon-spin loading-icon"></i> Loading Data...
      </nz-option>
    </nz-select>
  